Plumb-level.



. per end` of the JOHN G. LiNToN,

PATENT oEEIoE.

OF TRINITY CENTER, CALIFORNIA.

PLUME-LEVEL.

Specification-of Letters Patent.

Patented Dec. 4, 1906.

Application filed April 10,1906. Serial No. 311,008.

To {LZ/Z whom, it mag/concern:

Be it known that I, JOHN G. LINTON, a citizen of the United States,residing at Trin-v ity Center, in the county of Trinity and State ofCalifornia, have invented certain new and useful Improvements inPlumb-Levels, of which the ollowing is a specification. Y

This invention relates to a combined plumb-bob and spirit-level, and hasfor its object the provision of a device of this character adapted toaccurately indicate when the surface u on which the device is placed isperfectly evel and also to indicate to a degree the angle of the planeof said surface with relation to a perfectly-level plane.

Further objects and advantages of the invention will be set forth in thedetailed descri tion which now follows.

he accompanying drawings illustrate a front elevation of a plumb-bob andspiritlevel constructed in accordance with the invention. j

Figure 1 is a front elevation of a device constructed in accordance withmy invention and Fig. 2 is a vertical transverse section thereof on theline 2 2 of Fig. 1.

Referring to the drawings, the numeral 5 designates an elongated block.ASecured to the face of this block is a circular scale 6, which may begraduated in any desired manner, though the indications are preferablydegrees o a circle. Pivoted concentrically within this scale, as at7, isan A-shaped frame 8, the lower end o'f which is spanned by a sirit-level-Qy and is weighted, as at 10. An in icating-point 11,ycarried upon the up- A-shaped frame, -coacts with thegraduations of thescale to indicate the' degree of elevation of the surface to which thedevice is applied. The weight -10 serves to infiuence theindicating-point to promptly respond to any movement of block 5.

f desired, the indicating-point 12'adjacent the side opening 13 inprovided for accom of the spirit-level loyed to aid in determining maybe em ble is exactly in the middle of when the bu the level 9.

Fromnthe foregoing description it will be seen that simple and efficientmeans are herelishing the objects of the invention; but whi e theelements shown and described are well adapted toserve the urpose forwhich they are intended it is to e understood that my invention is notlimited to the precise construction setforth, but includes within itspurview such changes as may be made Within the scope of the ap'- pendedclaim.

Having described my invention, what I claim is- A device of the type setforth comprising a supporting-block formed with a circular-recess, anannular scale secured to said block and exteriorly concentric to thewall of said recess a rocking frame kcentrally pivoted within saidrecess, said frame being of substantial A shape and being formed" with acentral cross-bar, integral legs projecting on each side of saidcross-bar and converging to an.

a ex at their upper' ends, a weight spanning t e lower ends of saidlegs, and a doubleended perpendicular pointer intersecting saidcross-bar at a central point said frame eing pivoted at the junction ofsaid cross-bar and said pointer anda horizontal spirit-level spanningthe lower ends of said legs above said weight, said pointer having itsupper end projected toward said scale and its lower end projected towardsaid level at a central oint.

In testimony whereof` I affix my signature in presence of two witnesses.JOHN G. LINTON. Witnesses: .'I. F. BERGIN, R. C.. CARTER.l

